Centrifugal brake for harness-hangers.



L. M. LYMB'URNER.

CENTRIFUGAL BRAKE FOR HARNESS HANGERS. APPLICATION FILED JAN. 14. 1915. RENEWED MAR. 21, 1911.

Patented Apr. 24, 1917.

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L. M. LYMBURNER.

CENTBIFUGAL BRAKE FOR HARNESS HANGERS. APPLICATION FILED JAN. 14. 1915.- RENEWED MAR. 21, 1917.

1,223,815, Patented Apr. 24, 1917.

2 SHEETS-SHEET 2- INVENTOR WITNESSES W I OENTRIFUGAL BRAKE FOR HARNESS-HANGERS.

Specification of Letters Patent.

Patented Apr. 24, 1917.

Application filed. January 14, 1915, Serial No. 2,199. Renewed March 21, 1917. Serial No. 156,300.

To all whom it may concern:

Be it known that 1, Louis MARonL Lr r- BURNER, a subject of the King of Great Br tain, and residing at the city of Montreal, 1n the Province of Quebec, in the Dominlon of.

Canada, have invented certain new and use-,

ful Improvements in Centrifugal Brakes for Harness-Hangers; and I do hereby declare that the following is a full, clear, and exact description of the same.

The invention relates to an improved centrifugal brake for harness hanger and is designed particularly for use in fire stations where the harness is suspended by a cable from the hanger attached to the ceiling, means being usually provided in the hanger for pulling the suspension bar upward out of the way when the harness has been released therefrom.

Usually, a volute spring is the means employed to wind in the cable and a great objection has been that the ceiling and sometimes the suspension bar is damaged by the recoil.

Now, it is the object of the present invention to provide brake means preferably of an adjustable nature whereby the speed of recoil is limited to a degree suflicient to prevent said damage. When door releasing means are also embodied in the hanger, it is also the purpose of the invention to provide a buffer attachment in conjunction therewith.

The invention is shown in the accompanying drawings in which Figure 1 is a side view of the hanger according to the invention with the door releasing attachment in dotted lines.

Fig. 2 is a cross section on the dotted line AB Fig. 1.

Fig. 3 is a vertical section on the dotted line C-D Fig. 2. I

Referring to the drawings, 1 is the casing of substantially D-shape formed of the two side plates 2 and 3 secured together by the bolts 4 and having the flanges 5 for attaching the device to a ceiling or beam. A filling piece 6 extends around the casing and is firmly secured between the sides 2 and 3 and provided with a cable slot 7 at one side thereof.

8 is a spindle extending across the casing 1 in the center thereof and journaled at its ends in bosses 9 and 10 in thesides 2 and 3 respectively. One end of the spindle 8 within the casing l is provided with a groove 11 in which the inner end of a volute spring 12 is secured, the outer end 13 of said spring being secured to one of the bolts 4 as clearly shown in Fig. 3.

The other end of the spindle 8 within the casing is provided with ratchet teeth 1% and between said ratchet teeth and the spring 12, a pulley 15 is loosely mounted on the spindle 8, said pulley carrying a pawl 16 spring pressed into engagement with the teeth 14:. As thus far described, it will be seen that the cable 17 attached to and wound on the pulley'15 and extending out of the slot 7 will cause the spring 12 to be wound up when the free end of the cable containing the harness suspension bar (not shown) is pulled down. The weight of the harness carried by the suspension bar is sufficient to balance the power of the spring 12 and hold it in its wound up position, but as soon as the harness is released, the suspension bar will fly up toward the hanger owing to the unwinding of the spring and the rotation of the spindle 8 and pulley 15 caused thereby. In order to adjust the power of the spring 12, the spindle 8 is provided with a squared end 18 extending through one side of the casing any harness Weight on the cable 17.

It will be seen that the lower end of the casing is of semi-circular shape and this shape is continued on the casing side 3 to form an annular flange 20 having an interior friction surface.

21 are pins secured at diametrically opposite points to the outer face of the pulley 15 within the annular flange 20, these pins forming supports for a pair of spring brake arms 22 respectively secured at one end to a pin 21 and of semi-circular shape, the free end 23 of each of said arms being provided with a weight 24 at its inner side. The outer surface of each of these brake arms is provided vvith a fiiction'linei" adapted tocontact the friction surface of the flange 20. Adjusting screws 26 threaded intears 27 v projecting from the outer face of the'p'u'lley 15" abut the inner surfaces-otthe springarms 22 to limit the inward movement of said meq. l. A When the harness Weight is released from the cable-- spindle; the pu-1 Iey15-rotates brake 'can -be 're'gu'lated' by the slacl'tening or.

tightening of the'screws'2'6 to'co'rne into op': eratiorr at any desired speedof rotation. I

. An opening 28fis' provided the side- 30f the casing through which the pawl 15* and screws 26*ca1i be reached for adjustin'g pur oses.- p .I Wi'sh it'to be-under stood'that'the details of construction: herein set forth and shown in the" drawings are" but: one": suitable ai' rangement and may be' soinevvhat modified; if found desirable so long as the essential features are retained as set forthin the folloWing claims for novelty.

What I claim is a ll A ce' mfugal'brake' of the character described, com-prising a rotatable member, spring brake arms, means for fixing one end of each brake arm to said rotatable member, a Weight secured to the free end of each brake arm, ears-carried by saidrotatable member at points near the Weighted ends of said brake arms, and: screivsthreaded throngh'said-arms' and adapted to engage the inire'i' -faces of saidbrake'arms an'd'adjust them radially;

2! A' "emifag i bi'ake of the'charact'er described com aris'ing, a rotatable ;mfember, 7 pins carried by said 1 member, spring brake each havingone end coiled about and fixedto one-"of said pin's, a w'el'ght secured to the free end of each brake arm, ears carried by said rotatable member at points nearthe Weighted'ends of said brakearms, screWs"tln e'a'ded through said ears and adapted to engage the inner faces of said brake arms to" adj nst the same radially.

Signed" at lilntreal, Quebec, Canada, this 6th day Of- 'Oct'ober, 1914. v g M LOUIS MARCEL LYMBURNER'. Witnesses:

Phen m; GI PATENAUDE;

Copies this patent maybeobtained-fertile at: each, I)? masses-mi; flie' commissmnerbr fltnti} wa'ihington, D. 0." 

